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На клетчатом поле со стороной 1 см изображён прямоугольник. 1) Найди площадь этого прямоугольника. ответ дай в квадратных сантиметрах 2) Проведи на рисунке выше прямую линию так, чтобы этот прямоугольник оказался разбит на триугольник и пятиугольник

Математика

Ответы

Аношкина1696

ответ: S=12см²

Пошаговое объяснение:

1) 6*2=12(см) - S

2) не понял, как прямую провести

svt5299

6*2=12 см

Пошаговое объяснение:

Линию не поняла как проаести. Ты уверен(а) что прямую?

yuliasam

Задание 1.

Площадь прямоугольника равна произведению двух его сторон  

1) 2,376 * 0,42 (72 -42,65) * 0,08=2.34

2) (72 -42,65)=29.35

3) 2,376 * 0,42=0.99792

4) 0.99792*29.35=29.288952

5) 29.288952*0.08=2.34311616  

6) Округляем = 2.34

Задание 2.

1) 15,8 * 20,5 = 323,9 (руб.) - получил за вишни.

2) 22,6 * 13,3 = 300,58 (руб.) - за сливы.

3) 323,9 - 300,58 = 23,32 (руб.) -получил больше за вишни.  

Задание 3.

длина- 4,5*2=9 см

высота- 4,5-0,9=2,6 см

площадь-2(ab+bc+ac) S=2(9*4,5 + 9*3,6 + 4,5*3,6) S=178,2(cм2)

объем-V=abc V=9*4,5*3,6 V=145,8(см3)

                                                                         

Станиславович ыфвыв

30уч-100%

?уч  - 20%

30*0,2=6(уч)-  на 6 учнів збільшилась кількість учасників гуртка 

30+6=36(уч)-кількість учасників гуртка

    

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          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На клетчатом поле со стороной 1 см изображён прямоугольник. 1) Найди площадь этого прямоугольника. ответ дай в квадратных сантиметрах 2) Проведи на рисунке выше прямую линию так, чтобы этот прямоугольник оказался разбит на триугольник и пятиугольник
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